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Leases - Other Information (Details) $ in Thousands | 9 Months Ended
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Sep. 26, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities: |
Financing cash flows from finance leases | $ 1,908
Operating cash flows from finance leases | 870
Operating cash flows from operating leases | 18,140
Right of use assets obtained in exchange for new lease obligations: |
Finance lease liabilities | 1,716
Operating lease liabilities, including from acquisitions | $ 163,416

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